Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, thien anh, thien danh
trung tran » trung tuan, trung thanh, trung tam
trong dung » trung dung, trong rung, trong dang
thong dung » thong cong, thong thuong
hieu manh » chieu xanh, hieu nganh, dieu hanh
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (hieu manh)) - thanh trung tran quang ((trong dung) or (thong dung)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh trung tran quang ((trong dung) OR (thong dung)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - thanh trung tran quang ((trong dung) or (thong dung)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - thanh trung tran quang ((trong dung) or (thong dung)) toan cao*.